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QC Sample Results <br /> Client: Ghilotti Construction Company Inc Job ID: 720-93317-1 <br /> Project/Site: Hayward 680 Alamo <br /> Method: 82608 - Volatile Organic Compounds (GC/MS) (Continued) <br /> Lab Sample ID: LCS 720-266845/5 Client Sample ID: Lab Control Sample <br /> Matrix: Solid Prep Type: Total/NA <br /> Analysis Batch: 266845 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> 1,2,4-Trichlorobenzene 50.0 48.4 ug/Kg 97 60-140 <br /> 1,1,1-Trichloroethane 50.0 42.7 ug/Kg 85 70-130 <br /> 1,1,2-Trichloroethane 50.0 48.7 ug/Kg 97 70-130 <br /> Trichloroethene 50.0 46.5 ug/Kg 93 70-133 <br /> Trichlorofluoromethane 50.0 49.1 ug/Kg 98 60-140 <br /> 1,2,3-Trichloropropane 50.0 45.5 ug/Kg 91 70-146 <br /> 1,1,2-Trichloro-1,2,2-trifluoroetha 50.0 48.1 ug/Kg 96 60-140 <br /> ne <br /> 1,2,4-Trimethylbenzene 50.0 41.1 ug/Kg 82 70-130 <br /> 1,3,5-Trimethylbenzene 50.0 40.9 ug/Kg 82 70-131 <br /> Vinyl acetate 50.0 54.5 ug/Kg 109 38-176 <br /> Vinyl chloride 50.0 47.4 ug/Kg 95 58-125 <br /> m-Xylene&p-Xylene 50.0 43.5 ug/Kg 87 70-146 <br /> o-Xylene 50.0 44.2 ug/Kg 88 70-140 <br /> Xylenes,Total 100 87.7 ug/Kg 88 70-146 <br /> 2,2-Dichloropropane 50.0 43.8 ug/Kg 88 70-162 <br /> LCS LCS <br /> Surrogate %Recovery Qualifier Limits <br /> 4-Bromofluorobenzene 91 45-131 <br /> 1,2-Dichloroethane-d4(Surr) 92 60-140 <br /> Toluene-d8(Surr) 92 58-140 <br /> Lab Sample ID: LCS 720-266845/7 Client Sample ID: Lab Control Sample <br /> Matrix: Solid Prep Type: Total/NA <br /> Analysis Batch: 266845 <br /> Spike LCS LCS %Rec. <br /> Analyte Added Result Qualifier Unit D %Rec Limits <br /> Gasoline Range Organics(GRO) 1000 926 ug/Kg 93 70-122 <br /> -C4-C12 <br /> Lab Sample ID: LCSD 720-266845/6 Client Sample ID: Lab Control Sample Dup <br /> Matrix: Solid Prep Type: Total/NA <br /> Analysis Batch: 266845 <br /> Spike LCSD LCSD %Rec. RPD <br /> Analyte Added Result Qualifier Unit D %Rec Limits RPD Limit <br /> Methyl tert-butyl ether 50.0 44.3 ug/Kg 89 70-144 3 20 <br /> Acetone 250 296 ug/Kg 118 30-162 4 30 <br /> Benzene 50.0 42.9 ug/Kg 86 70-130 2 20 <br /> Dichlorobromomethane 50.0 45.3 ug/Kg 91 70-140 1 20 <br /> Bromobenzene 50.0 44.4 ug/Kg 89 70-130 1 20 <br /> Chlorobromomethane 50.0 47.6 ug/Kg 95 70-130 2 20 <br /> Bromoform 50.0 53.1 ug/Kg 106 59-158 4 20 <br /> Bromomethane 50.0 46.4 ug/Kg 93 59-132 2 20 <br /> 2-Butanone(MEK) 250 272 ug/Kg 109 59-159 4 20 <br /> n-Butylbenzene 50.0 40.0 ug/Kg 80 70-142 2 20 <br /> sec-Butylbenzene 50.0 42.0 ug/Kg 84 70-136 1 20 <br /> tert-Butylbenzene 50.0 41.8 ug/Kg 84 70-130 2 20 <br /> Carbon disulfide 50.0 43.2 ug/Kg 86 60-140 0 20 <br /> Carbon tetrachloride 50.0 44.7 ug/Kg 89 70-142 1 20 <br /> Eurofins TestAmerica, Pleasanton <br /> Page 15 of 31 6/7/2019 <br />